Siv: hauv kev tsim cov txhuas hydroxide. Lub ntsiab lus: cov noob txhuas hydroxide raug tsoo, sib tov nrog cov kua aluminate. Cov tshuaj uas tau los ntawm kev sib xyaw ua ke yog incubated nrog kev sib tov thiab kho nrog carbon dioxide. Cais cov txhuas hydroxide ntawm cov kua txiv hmab txiv ntoo. Ntxuav cov txhuas hydroxide.
Qhov kev tsim kho tshiab no cuam tshuam txog kev tsim cov txhuas hydroxide.
Ib txoj kev tau txais cov txhuas hydroxide zoo [1] uas cov txheej txheem tau ua ob theem. Hauv theem thawj zaug, cov kua aluminate raug neutralized nrog hydrochloric acid, thiab cov txhuas hydroxide uas tau tawg zoo siv los ua cov noob decomposition ntawm cov kua aluminate supersaturated hauv theem thib ob.
Qhov tsis zoo ntawm txoj kev no yog cov nqi siab uas tshwm sim los ntawm kev ua kom cov caustic alkali tsis muaj zog los ntawm cov kua qaub, kev sib sau ua ke ntawm cov khoom tsis huv hauv cov tshuaj, thiab lwm yam.
Qhov ze tshaj plaws rau qhov kev tsim kho tshiab no yog ib txoj kev [2] uas siv hmoov txhuas hydroxide los tsim cov txhuas hydroxide zoo li noob.
Qhov tsis zoo ntawm txoj kev no yog cov tshuaj wintopo siab.
Lub hom phiaj ntawm kev tsim kho tshiab no yog txo tus nqi zog ntawm ib chav los ntawm kev nce cov zis ntawm cov txhuas hydroxide zoo.
Ua cov tshuaj aluminate nrog cov pa roj carbon dioxide, cov txheej txheem carbonization yog siv dav hauv cov nroj tsuag alumina ua haujlwm los ntawm kev sintering. Kev siv carbonization tuaj yeem muab cov hydroxide tso zis siab.
Qhov loj ntawm cov noob ntawm txhuas hydroxide tau txais hauv cov txheej txheem carbonization feem ntau nyob ntawm qhov kub ntawm carbonization thiab cov khoom sib xyaw ntawm aluminate cov tshuaj (kev sib xyaw ntawm alkali thiab alumina).
Txoj kev paub (Light metals. 1937, No. 10, S. 8-15) kev tsim cov txhuas hydroxide zoo los ntawm txoj kev carbonization, suav nrog kev ua cov pa roj carbon dioxide ultracracker aluminate solutions (concentration 200 g / l) ntawm qhov kub qis (30txogC).
Txawm hais tias txoj kev no muab cov khoom siv aluminium hydroxide zoo heev, nws siv tsis tau vim muaj teeb meem kev siv tshuab tshwm sim hauv cov theem kawg ntawm cov txheej txheem: Lub Chaw Haujlwm ntawm cov nag thiab ntxuav.
Txawm li cas los xij, thaum siv nizkokontsentrirovannye txoj kev carbonization tsis ua haujlwm.
Qhov loj ntawm cov noob ntawm txhuas hydroxide tau txais nyob rau hauv cov xwm txheej no, uas yog tus cwj pwm los ntawm cov khoom tsis sib xws thiab cov ntsiab lus siab ntawm cov khoom loj.
Qhov kev tsim kho tshiab no muaj nyob rau hauv txoj kev tsim cov txhuas hydroxide zoo, suav nrog kev sib tsoo cov noob txhuas hydroxide, sib tov nrog cov kua aluminate, laus cov tshuaj uas tau los ntawm kev sib tov, sib cais cov txhuas hydroxide ntawm cov cawv niam thiab ntxuav, ua ntej sib cais cov txhuas hydroxide ntawm cov kua txiv hmab txiv ntoo yog kho nrog carbon dioxide.
Cov kev tshawb fawb tau qhia tias thaum ua cov pa roj carbon dioxide aluminate uas muaj cov khoom khov loj, qhov loj me ntawm cov khoom me me yuav luag zoo ib yam.
Thaum ua cov noob uas raug tsoo hauv cov kua aluminate supersaturated, thiab laus cov kua uas tau los ntawm kev sib tov ua rau muaj ntau cov txhuas hydroxide uas tawg ua ntau heev. Txawm li cas los xij, cov txiaj ntsig ntawm cov txhuas hydroxide zoo uas tsis muaj kev ua ntxiv ntawm cov kua yog qis thiab nyob ntawm qhov concentration ntawm caustic alkali hauv cov kua: qhov concentration ntawm alkali ntau dua, qhov tso zis qis dua.
Thaum ua cov pa roj carbon dioxide, qhov kev ncua thawj zaug yog muab los ntawm cov zis ntawm txhuas hydroxide zoo ib yam li thaum ua cov kev ncua tom qab kev raug thawj zaug, txawm li cas los xij, ua rau cov khoom me me ntawm txhuas hydroxide nce ntxiv.
Txoj kev no siv tau los ntawm kev siv cov khoom siv uas twb muaj lawm.
Txoj kev zoo dua yog cov nroj tsuag alumina raws li cov thev naus laus zis spechitelnoj.
Kev sib piv cov ntaub ntawv los ntawm ntau qhov kev sim qhia tau hais tias kev ua cov hydrate slurry tau txais tom qab raug cov khoom sib xyaw ntawm aluminate kua thiab cov noob shredded, carbon dioxide tso cai rau kom tau txais cov txhuas hydroxide zoo thiab xyuas kom meej cov khoom lag luam siab.
PRI kuv R 1. 0.02 kg ntawm txhuas hydroxide nrog qhov nruab nrab loj ntawm 2.8 μm tau sib xyaw nrog 1 liter ntawm aluminate kua uas muaj, g / l: Na2CMOS 100,8; Al2O3107,4.
Qhov kev ncua ntawd tau dhau ntawm 60txogNrog ntau tshaj 10 teev Tawm zoo txhuas hydroxide yog 40,4, qhov nruab nrab particle loj hauv cov sediment ntawm 3.6 μm. Cov khoom sib xyaw ntawm cov kua theem ntawm cov kua ncua, Noi sib tov, muaj txog 12. CO2Lub sijhawm ua tiav ntawm 6 teev rau cov khoom seem ntawm sodium oxide hauv cov kua tom qab kev kho mob ntawm 5.6 g / L.
Qhov nruab nrab ntawm cov khoom me me hauv cov av tom qab kho mob ntawm 4.8 μm. Cov zis ntawm txhuas hydroxide 102,5.
PRI mme R 2. 0.02 kg ntawm txhuas hydroxide nrog qhov nruab nrab loj ntawm 2.8 μm tau sib xyaw nrog 1 liter ntawm aluminate kua thiab tam sim ntawd (tsis muaj kev raug) tau kho nrog carbon dioxide. Lub sijhawm kho thiab concentration ntawm CO2nyob rau hauv ib qho roj sib xyaw zoo ib yam li piv txwv 1.
Cov zis ntawm txhuas hydroxide yog 103,1, qhov nruab nrab me me hauv cov av ntawm 30.4 μm.
Yog li ntawd, kev siv cov txheej txheem saum toj no ntawm kev ua haujlwm: sib tov ntawm aluminate kua nrog cov noob tawg, qhov kev ncua, carbonation slurry ua ntej sib cais ntawm txhuas hydroxide tuaj yeem muab cov zis siab zoo txhuas hydroxide.
TXOJ KEV tsim cov ALUMINUM HYDROXIDE zoo, suav nrog kev sib tsoo cov noob txhuas hydroxide, sib tov nrog cov kua aluminate, laus cov txiaj ntsig nrog kev sib xyaw, sib cais cov txhuas hydroxide ntawm cov cawv niam thiab ntxuav,
Lub sijhawm tshaj tawm: Lub Xya Hli-09-2020